Symmetries of Spacetimes and Riemannian Manifolds Autor Krishan L Duggal et al. 30 iun 1999 Hardback Preț: 408.76 lei 6-8 săpt.
Null Curves and Hypersurfaces of Semi-Riemannian Manifolds Autor Krishan L Duggal et al. noi 2007 Hardback Preț: 588.18 lei 717.29 lei Se retipărește -18%